<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta 
        name="viewport" 
        content="
            width=device-width, 
            initial-scale=0.5,
            "
        >
    <title>Document</title>
    <style>
        * {
            margin:0;
            padding:0;
        }
        .box {
            width:200px;
            height:200px;
            background: pink;
        }
    </style>
</head>
<body>
    <div class="box">
        
    </div>
</body>
</html>